DonorschooseOrgChallengeLogo.jpgTwitter co-founder Biz Stone posted on the social-networking site’s blog that Donorschoose.org is running its Social Media Challenge, which allows users to choose a Twitter user to support or create giving pages of their own.

Donorschoose.org describes itself as “an online charity connecting you to classrooms in need,” and Stone wrote that last year’s Social Media Challenge “raised $270,000 to provide 65,000 students with the resources needed to learn.”

Stone added:

One of the proposals among several I’m personally hoping to get funded is Making Science Fun! Ms. M’s Classroom is a high-poverty school in Arkansas. The fourth-graders need sets of books about simple machines, properties of the earth, electricity and matter, as well as hands-on activity tubs for each topic. The letters the kids write to you after donating are their own reward.